netdev - [PATCH net-next 2/2] net: skb: Remove skb_data_area

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Date:   Fri, 13 May 2022 10:34:00 -0700
From:   Ricardo Martinez <ricardo.martinez@...ux.intel.com>
To:     netdev@...r.kernel.org, linux-wireless@...r.kernel.org
Cc:     kuba@...nel.org, davem@...emloft.net, johannes@...solutions.net,
        ryazanov.s.a@...il.com, loic.poulain@...aro.org,
        m.chetan.kumar@...el.com, chandrashekar.devegowda@...el.com,
        linuxwwan@...el.com, chiranjeevi.rapolu@...ux.intel.com,
        haijun.liu@...iatek.com, andriy.shevchenko@...ux.intel.com,
        dinesh.sharma@...el.com, ilpo.jarvinen@...ux.intel.com,
        moises.veleta@...el.com, sreehari.kancharla@...el.com,
        Ricardo Martinez <ricardo.martinez@...ux.intel.com>
Subject: [PATCH net-next 2/2] net: skb: Remove skb_data_area_size()

skb_data_area_size() is not needed. As Jakub pointed out [1]:
For Rx, drivers can use the size passed during skb allocation or
use skb_tailroom().
For Tx, drivers should use skb_headlen().

[1] https://lore.kernel.org/netdev/CAHNKnsTmH-rGgWi3jtyC=ktM1DW2W1VJkYoTMJV2Z_Bt498bsg@mail.gmail.com/

Signed-off-by: Ricardo Martinez <ricardo.martinez@...ux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 include/linux/skbuff.h | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 9d82a8b6c8f1..2810a3abe81a 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1764,11 +1764,6 @@ static inline void skb_set_end_offset(struct sk_buff *skb, unsigned int offset)
 }
 #endif
 
-static inline unsigned int skb_data_area_size(struct sk_buff *skb)
-{
-	return skb_end_pointer(skb) - skb->data;
-}
-
 struct ubuf_info *msg_zerocopy_realloc(struct sock *sk, size_t size,
 				       struct ubuf_info *uarg);
 
-- 
2.25.1